Copper mine stalactites
Stalactites
Stalactites and stalagmites, Liguria
Stalactites, Toirano caves, Liguria, Italy
Stalactites in cave
Stalagmites, Toirano caves, Liguria, Italy
Quartz stalactites
Stalactites and stalagmites
Stalactites in a cenote
Former limestone cave now exposed to sea
Mineral deposits on rocks in a cave, Thailand
Stalactite
Spain, Andalusia, Nerja, Cuevas de Nerja, stalactites
South Africa, Western Cape, Oudtshoorn, Cango Cave 1
Krizna Jama Cave, Loz Valley, Slovenia
Cave stalagmites
Alvados caves, Leiria, Portugal
Grotta Su Marmuri, Sardinia, Italy
Malachite Stalactite
Malachite mineral sample
Iran, Zanjan Province, Garmab, Katale Khor, Flowstone cave
Grotta del Fico, Sardinia, Italy
Phong Nha Caves,Dong Hoi,Vietnam
Stalactites and stalagmites in cave
Chandelier Cave, Palau
Malachite
Cave stalagmite
Geothermal limestone terrace
Cave stalactites
Limestone formations in Carlsbad Caverns
Caves of Arta, Mallorca, Spain
Rock strata
Avakas Gorge, Cyprus
Jasper mineral rock deposits
Croatia, Island of Krk, Dobrinj, View of Biserujka cave
Bermuda, Crystal Cave, Stalagmites and stalactites
Limestone formation in Carlsbad Caverns
Rock concretions
Limestone cave
Sandstone specimen
Slate outcrop, France
熊本県 球泉洞
Copper salts on a rock
Jarosite on rock
Montenegro, Cetinje, Lipa Cave
South of Taiwan
Agate with round centre
View of large ice stalagmites in a cave
Limestone and shale strata
Turritella agate
Limestone formations in Lehman Caves
Cross-bedding in sandstone rock
Germany, Bavaria, Franconia, Upper Franconia, Franconian Switzerland, View of Sophienhoehle cave with stalactite
Polished slab of Malachite
Botryoidal malachite
Man exploring Krizna Jama Cave, Loz Valley, Slovenia
Carlsbad Caverns, New Mexico, USA
Eroded rock formation
Basalt columns
Trachyte specimen
Brandwag buttress, South Africa
Interior of the Caves of Arta.
New Zealand, Oceania, North Island, Waitomo Caves, Ruakuri Cave, Stalactites and limestone formations in cave
Cave exploration, Brazil
Conichalcite and adamite
Marble pebbles
Green marl
Scapolite
Sard Onyx layered Agate
Smoke and light coming through crack in lava rock, elevated view
Corniche Basque, France
秋芳洞の黄金柱
秋芳洞の入口
Giant's Causeway
Slot canyon
Gilfenklamm gorge, Italy
Precambrian stromatolites
七ツ釜鍾乳洞
七ツ釜鍾乳洞の親子地蔵
Reed Flute Cave in Guilin, Guangxi Province, People's Republic of China
Colourful coastal rock and clear blue sea
Barringer Crater
Hoodoo rock formation
Coastal limestone platform
Lower Antelope Slot Canyon, Arizona
Devil's Slide
Coastal rock ledge at high tide
Underwater limestone cave formations
Carlsbad Caverns National Park, New Mexico, USA
Arid landscape
Mica Schist specimen
Serpentine Marble specimen
Talc Schist specimen
Pegmatite specimen
Pitchstone specimen
Scoria specimen
Tuff specimen
Shale specimen
Breccia specimen
Limestone specimen
Dolomite specimen
Aquamarine gem, 3 carat
Zircon gem
Ruby
Polished Opal gemstone
Polished Opal
Antigorite, Thurman, New York, USA
Natrolite, Tyringham, Massachusetts, USA
Thomsonite specimens
Analcite, Uralberg, Austria
Quartz crystals
Tellurium, Hungary
Rhyolite, Mexico
Chrysocolla
Agglestone Rock, UK
Rock formations, Karnataka, India
Native Copper
Native copper
Sedimentary rock concretion
Mineral deposition
Dolomite
Limestone pavement, New Zealand
Ankerite with calcite
Rose apatite, dolomite & pyrrhotite crystals
Trapezohedral leucite crystal
Flos ferri aragonite in rock groundmass
Greywacke
Two nephrite gems cut as droplets
Spherical concretions of radiating azurite crystals
Gypsum satin spar
Gypsum rock
Fayalite
Fossil algae
Aggregate of muscovite crystals
Nummulitic limestone rough with fossils
Willemite crystal
Welsh slate, close up
Banded flint
Two short prismatic augite crystals
Pyrite Nodule
Thin crust of calomel crystals
Sandstone rock formation, South Africa
Concretion of sand and iron on Dinosaur Ridge, Colorado, USA
ガンガラーの谷 イキガ洞
与論島 赤崎鍾乳洞
Pteridinium fossil
Fossilised insects (sciaridae) in Baltic amber
Araganite crystals in limestone cave
Delicate araganite structures in cave
Diros caves, Greece.
Malachite, an ore of Copper
Native copper, macrophotograph
Mine shaft, Kenya